Answer:
"One theory put forward by researchers, based on the study, is that we come to music to experiment with identity and define ourselves, and then use it as a social vehicle to establish our group and find a mate, and later as a more solitary expression of our intellect, status and greater emotional understanding."
"Researchers have also found a connection between music taste and personality traits. While researchers are still investigating a link between listening to music and its ability to influence a person's mood long-term, strong evidence has shown how music can improve or dampen your mood more immediately."
Explanation/Summary:
Research shows that musical tastes shift as we age are in line with key "life challenges." Teenage years were defined by "intense" music, then early adulthood by "contemporary" and "mellow" as the search for close relationships increases, with "sophisticated" and "unpretentious" allowing us to project status and family values later in life. This study used data from more than a quarter of a million people over a 10 year period.